Chroma — Reveal any number of cards in your hand. target creature gets +X/-X for each red mana symbol in those cards' mana costs.

Flashfire Fusillage- 4R
Sorcery
Purity - You may cast this card any time you could cast an instant if only red mana is spent to cast it.

~ deals damage to target creature or player equal to the number of mountains you control.

Prismatic Pugilist - 2
Creature - Shapeshifter Warrior

~ is all colors.
2/2

Blood-red Bluffs
Land (C)
Color Indicator: Red

T: add R to your mana pool

In 50 words or less, explain how this theme fits into the set, either mechanically and/or in terms of flavor.

I'm looking to explore what happens if mono color is pushed to its fullest extent. The more you play of a certain color, the stronger your spells are. Provide rewards for having lots of mana symbols of one color, permanents of one color, and spending only one color on spells.

The problem is not that flowstone isn't red. The problem is that this, like Auger Spree, would tend to be used as removal, and this form of removal doesn't belong in mono-red.

The flowstone effects were significantly harder to use as removal since they usually did not scale if unrestricted (it was mostly used on creatures). Flowstone Channeler and Flowstone Blade are significantly more costly then Veins Afire by the time you get to +3/-3 (which will get rid of quite a lot of stuff).

I agree that +X/+0 is likely the better effect, by I can see the currently worded card as fair on a sorcery, given that comparison. Granted, Tempest is a long time ago, but the effects are comparable in cost.

I don't think Mono-color as a theme offers enough variety. Playing only one color would mean there are only around 5 playable color combinations, and it may cause players to get bored with the set quicker than usual.

If we go a "Mono-color vs. Multicolor" route, maybe these ideas could be used for the Monocolor portion of the Age of Mana submission.

However, I feel that even the cards for monocolor should not push color purity so far that it punishes splashing. There would be more diversity among nearly mono-color decks if people had the freedom to have a second minor color. For example, a nearly mono-Red burn deck that splashes Green for some hexproof Wurms for the late game can behave differently from a nearly mono-Red burn deck that splashes blue for some card draw to refill your hand.